13 Awe-Inspiring Images of the Polar World

Canadian-born photographer Paul Nicklen is used to traveling in isolated environments. He has tracked polar bears in Norway, gone diving with leopard seals in Antarctica, and spotted the rare Kermode “spirit bear” in British Columbia. Now, the National Geographic photographer is making a rare appearance in the urban world. Today he's opening his first fine art gallery, the Paul Nicklen Gallery, in New York City. In honor of Earth Day, dive into some of his work (even if you're nowhere near the Big Apple) with a few of Nicklen's most incredible images from some of the most remote places on Earth: